Program in C to find out total marks & percentage of three subjects

Write a program in C to find out total marks & percentage of three subjects

#include <stdio.h>

void main ()

{

          int m1,m2,m3;

          float tm,per;

          clrscr ();

          printf ("Enter M1: ");

          scanf ("%d",&m1);

          printf ("Enter M2: ");

          scanf ("%d",&m2);

          printf ("Enter M3: ");

          scanf ("%d",&m3);

          tm=m1+m2+m3;

          per=(tm/300*100);

          printf ("\nTotal Marks are %.2f",tm);

          printf ("\nPercentage is %.2f",per);

          getch ();

}